NEED? No, but depending how hard he wheels it they will rub the fender if he doesn't have the right backspacing. Running the Moabs with .25" spacers and 285s was the sweet spot for the rear with the fender rolled. But most guys don't want to run a .25" spacer and the closest you an get to that with stock wheels is a 1" spacer, that's a .5" difference. I know Lifted_Up was running 285s with 1.25" spacers and had to extend the bumpstops because he was rubbing. I'm just trying to speak from experience! But please try whatever setup you want and let us know how it works out for you.